Apparatus for generating ozone.



No. 636,868. Patented Nov. I4, |899, H. TINDAL.

APPARATUS FUR GENERATING 0ZONE.

(Application led IDee. 22, 1898.) (No Model.) 2 Sheets-Sheet I.

No. 636,868. Patented Nov. I4, |899. H. TINDAL.

APPARATUS FUR GENERATING DZONE.

(Application filed Dec. 22, 1898.)

2 Sheets- Sheet 2.

(No Model.)

P7 /V/V HENRY TINDAL, OF AMSTERDAM, NETHERLANDS.

APPARTUS FOR GENERATING OZONE.

SPECIFICATION forming part of Letters Patent N o; 636,868, dated November 14, 1899. Application ined Deeember 22,1898. serieiNo. 700,052. (No model.)

To aLZZ whom t may concern:

Be it known that I, HENRY TINDAL, a subject of the Queen of the Netherlands, and a resident of Amsterdam, in the Kingdom of the Netherlands, have invented a new and Improved Apparatus for Generating Ozone, (for which applications for patent have been filed in Germany on the 7th of June, 1898; in France on the 4th of November, 1898, and in Great Britain on the 19th of November, 1898, No. 24,543,) of which the following is an exact specication.

The object of this invention is to produce ozone in larger quantities and in a cheaper and simpler manner than hitherto.

Experiments heretofore conducted to generate ozone economically and on a commercial scale were based upon the principle of the iniiuence of dark electrical discharges upon the oxygen to be ozoniz'ed, together with a cooling of the gas each time the same passed through the discharging-poles, the purpose being to obtain a gas of high concentration. In this manner, it is true,a comparatively high concentration was obtained; but the expense of this method of production was not in proportion to the result in consequence of the necessity of the periodical recooling of the gases. I have now ascertained that a considerably higher result may be obtained if the cooling be disregarded and care only taken that the ozonized gas be caused to pass through an extended even and dense dischargingeiield. On this principle the apparatus forming the subject of the present invention is based.

The one discharging-pole consists of a kind of semicircular metal trough, which upon the surface where the discharge takes place is provided with a slight layer of enamel. The semicircular trough, closed or covered by means of a plate of good insulating-glass, is secured in position by lead strips or the like, so that the metal trough, with the glass plate, forms a conducting-channel for the gas to be ozonized. At the same time the glass disk serves as a carrier for the second dischargingpole. This consists of a comparatively large number of semicircular metal disks, which are attached or secured in suitable manner to the glass plate, so that they come to lie within the gas-conducting channel, with their edges concentric to the surface of the channel.

In consequence of the absolutely equal dis tance of all points of both the dischargingpoles from each other an entirely even passing over of the high-tension current is obtained without any risk of a dame-arc forming, as there is an entire absence of all extending or projecting edges. Thus the resistance to be shunted in the high-tension service may be very small. Moreover, it has been found that even the slight layer of enamel upon the semicircular trough suffices in most cases. The enamel layer is employed in order to remove or compensate for the small irregularities of the cast iron,- from which material the trough, for purposes of economy, is manufactured, and in order to render any treatment, with the object of obtaining a smooth surface of the inner chan-A nel, unnecessary.

In order to make my invention more clear, I refer to the accompanying drawings, in which one form of carrying my invention into effect is shown, and in which- Figure l is a longitudinal section, Fig. 2 a plan, and Figs. 3 and 4 a cross-section and longitudinal section, through the end of the apparatus, drawn to a larger scale.

Proceeding to describe the drawings, in the casing 0. is the semicircular channel b, with the enamel layer b. The channel is covered by the glass plate c, which latter is held by angle-shaped spring-metal strips CZ, which are pressed down by screws e. The glass plate is provided with a number of holes, in which screws f are inserted. semicircular metal disks g, preferably of steel, are attached to the slotted heads of said screws. The said screws f, and also the said disks g, are held in position by nuts h. The high-tension circuit is preferably directly introduced into the apparatus at the screws f, and, if desired, liquid resistances may also be inserted in the circuit. The other pole of the high-tension service is directly connected to the casing at.

The gas to be ozonized is conducted through the opening 7c into the conduit formed by the channel b and the glass plates c and is conducted away through the opening 7c. During the time the gas passes through the said conduit the electric current passes uniformly and evenly in dark discharges from the disks g to the enamel layer or surface b' of the IOO channel b. The metal disks g may receive suitable dimensions and inclinations, so as to f produce a corresponding whirling or like motion of the gas, due consideration being given to insure that the outer circumference of each of the metal disks g is equally distant at all points from the surface of the channel b.

Having thus fully described the nature of this invention, what Idesire to secure by Letters Patent of the United States is*- The herein-described apparatus for the gen# eration of ozone,y comprisinga semicylindrical 

